package io;

import java.io.File;import java.io.FileOutputStream;

public class test {
    public static void main(String[] args) throws Exception {
        File file=new File("fos.txt");
        FileOutputStream fos=new  FileOutputStream(file);
        for (int i=97;i<123;i++){
            fos.write(i);
        }
        System.out.println("写入完毕");
        fos.close();
    }
}
